Story? *SPOILERS*

[Koki]

Originally Posted by Breach

Please no speculations

Now that's just mean.

@The missing 13 years: One possibility is that, after you save the ship, it's simply in service for another 13 years and then you board it. Or, dare I suggest it, it's simply a mistake of the devs, maybe they originally wanted the game to take place in 1981 but then changed it to 1968 except this one place. But you can't really tell what is and what is not a bug in a game like Cryostasis

@Melted reactor: After the Captain tries to break free from the iceberg, the Executive Officer reverses the engine - or something, I don't know enough about ships - which puts reactor into emergency lockdown mode(Among other things such as causing engine room fire) - again, or something like that. After they run away, it's possible that the reactor fails for whatever reason; it is old, there is no one to manintain it and it is out of fuel. As for why the main character is immune to radiation - you could also ask why the ship's denizens turned into beasts, or why their attacks make you colder instead of just ripping off your spleen. In other words, Cryostasis does not take place in "our universe" - it's more of a dream than a real experience for the main character. At least that's what I think.

@Seeing yourself: One possible explanation is that you're saving yourself by saving the ship. At the beginning of the game, when you fall from your sled and into the hole, you land on solid ice. Hovewer when the same scene is replayed at the end, and the captain saves you, there is water in the hole - if you'd fell into arctic water, you'd certainly die. And you would fall into the water if there was no captain, and there would be no captain if you didn't save the ship.
When you reach the ship itself, you see your dead body several times - dead from falling from the collapsed walkways.
In the hospital section, there is a moment just before the end where you see a chair standing in the corridor. When you approach, you see yourself sitting on it. Then the chair you stands up and walks away and water starts to pour in from nowhere - if it touches you, you die.

@Everything: One thing to consider is that as you change actions in the past, it affects the "future". For example, the bear. When you first arrive at the ship, the starboard crane is broken because it was hit by the iceberg. But during one of the Mental Echo sequences you have to retract it. Later, you see it used to get the dead bear on board. Which obviously couldn't happen if you didn't fix it first. And then the Captain wouldn't realize he has to act and wouldn't try to break out and...

I think we should just leave it alone...